package com.filter;

import com.model.User;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.IOException;

@WebFilter(filterName = "LoginFilter", urlPatterns = "/*")
public class LoginFilter implements Filter {
    public void destroy() {
    }

    public void doFilter(ServletRequest req, ServletResponse resp, FilterChain chain) throws ServletException, IOException {
        HttpServletRequest request = (HttpServletRequest) req;
        HttpServletResponse response = (HttpServletResponse) resp;
        HttpSession session = request.getSession();
        User loginUser = (User) session.getAttribute("loginUser");
        String path = request.getRequestURI();
        if (path.indexOf("/login.jsp") > -1 || path.indexOf("/register.jsp") > -1 || path.indexOf("/login.do") > -1) {
            chain.doFilter(req, resp);
            return;
        }
        if (loginUser == null) {
            response.sendRedirect("login.jsp");
        } else {
            chain.doFilter(req, resp);
        }
    }

    public void init(FilterConfig config) throws ServletException {
    }

}
